Perpetual calendars

ABSTRACT

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

Feb. 23, 1971 H, KHRE ETAL PERPETUAL CALENDARS Filed Aug. 23, 1968 0. m@ 50m, n y//fa v @M M, mmm, hx@

3,564,741 Patented Feb. 23, 1971 p ICC 3,564,741 PERPETUAL CALENDARS Stig Harry Khre and Karl Olov Harald Lwemo, Linkoping, Sweden, assignors to AB Svensk Trafiuess, Linkoping, Sweden, a corporation of Sweden Filed Aug. 23, 1968, Ser. No. 754,758 Int. Cl. B42d 5/04 U.S. Cl. 40-107 2 Claims ABSTRACT OF THE DISCLOSURE A perpetual calendar using two date cubes arranged side by side in a receptacle and having only one numeral on each side, the one of said cubes being provided with the six numerals 0, 1, 2, 3, 4 and 5 and the other cube with the six numerals 0, 1, 2, 6, 7 and 8, the numeral 6 "being shaped to serve also as the numeral 9. There may be two further cubes arranged side below the above mentioned date cubes, one said lower cube serving as a day cube and the other as a month cube. The receptacle for the cubes is formed to expose the necessary indicia of the cubes and to enable the lifting of the cubes by a grip between the inger and thumb in order to rearrange the cubes.

This invention relates to a perpetual calendar comprising adjustable date indicating numeral carriers which are adjusted day after day, year after year to show the actual date.

It is an object of the present invention to provide such a calendar, which is simple and durable.

It is another object of the invention to provide a calendar where the numeral carriers consist of cubes which are easy to move to indicate the actual date.

Further objects and advantages will become apparent from the drawing and the following description.

In the drawing:

FIG. l is a perspective view of the calendar according to the invention; and

FIG. 2 is a perspective view of a modified calendar according to the invention.

Referring more in detail to the drawing:

According to FIG. 1 the calendar consists of a holder in the form of a plate 1. In this plate there is made a V-shaped groove 2 in which are placed two cubes 3 and 4 of the same size. Thus the length of the groove 2 corresponds to twice the length of the edge of such a cube.

On each side the cubes are provided with one single numeral differing from the numerals on the other sides of the cube. Thus the cube 3 is furnished with the numerals O, l, 2, 3, 4 and 5, whereas the cube 4 is furnished with the numerals 0, 1, 2, 6, 7 and 8, the numeral 6 being shaped to serve also as the numeral 9.

Through these numeral combinations every date in question can be easily arranged. The cubes 3 and 4 are placed with one of their edges against the bottom of the groove 2 and safely retained therein Iwith a suitable inclination with regard to the viewer. Thus each of the cubes 3 and 4 can be placed with one of its twelve edges against the bottom of the groove 2.

Further the plate 1 is provided with two recesses 5 and 6 in which writing instruments, eg., ballpoint pens can be placed.

As it may be advantageous to have the calendar also indicate the day of the week and the month FIG. 2 discloses such a modification. Here two further cubes of equal size are placed side by side and below the date cubes 3 and 4. The one 7 of these cubes is a month cube and the other one 8 is a day cube, carrying corresponding text. On each side the month cube 7 carries the names of two months, placed below each other in such a way that when the upper name is turned right side up, the lower name is turned upside down. After turning the cube the last mentioned name is turned right side up, and the first mentioned name is turned upside down. The day cube 8 is in a similar Way provided with two names on each of three sides and with a single day name on the fourthe side, Whereas the other two sides are empty.

In this modification the holder consists of a trough shaped part 9 applied to a base plate 10.- The trough shaped part 9 has its front side so arranged that it uncovers the forwardly directed sides of the two upper date cubes 3 and -4 and the upper parts of the same side of the cubes 7 and 8, whereas the lower text of these cubes 7 and 8 is covered. The trough shaped part 9 is in a way not shown provided with a slot extending from the upper edge of said part and down to the two lower cubes 7 and 8, thus enabling the cubes to be lifted by a grip between the inger and thumb in order to have the cubes rearranged.

The plate 10 is provided with a stand 11 for a writing instrument.

According to the modification in FIG. 2 the plate 10 is of uniform thickness, whereas the trough shaped part 9 slopes backwards According to the modification of FIG. 1 the plate 1 slopes somewhat forwards, both these arrangements giving the cubes a suitable inclination with regard to the viewer.

The two calendars here above described are adapted to be placed on a horizontal support, e.g., a table top. Of course the calendar according to the invention can be modified for hanging on a wall.

What is claimed is:

1. A perpetual calendar comprising adjustable, dateindicating numeral carriers in form of two cubes arranged side by side in a receptacle and having only one numeral on each side, the one of said cubes having the six numerals 0, l, 2, 3, 4 and 5 and the other cube the six numerals 0, 1, 2, 6, 7 and 8, the numeral 6 being shaped to serve also as the numeral 9, said receptacle having a V-shaped groove having a length corresponding to twice the length of a cube side and a side depth which is less than the length of a cube side.

2. A perpetual calendar comprising adjustable indicia carriers in form of four cubes, two upper ones serving as date cubes and arranged side by side and having only one numeral on each side, the one of said date cubes having the six numerals 0, 1, 2, 3, 4 and 5 and the other date cube the six numerals 0, l, 2, 6, 7 and 8, the numeral 6 being shaped to serve also as the numeral 9, two lower ones of said four cubes also being arranged side by side below the date cubes, the one of said lower cubes serving as a day cube and the other one of said lower cubes as a month cube, a receptacle for said four cubes having the form of au upwardly open trough, said trough having a front recess exposing the numerals of the upper cubes and the upper half of the lower cubes, said trough also D having in the back a slot extending from the upper end 3 21 of it down to said lower cubes, enabling the cubes to be 2,247,250 6/ 1941 Patterson 273-130 lifted by a grip between nger and thumb. '2,797,512 7/ 1957 Sieve 40-107 3,118,675 1/1964 Lyle 273-146 References Cited ROBERT W. MICHELL, Primary Examiner UNITED STATES PATENTS 5 4 1,569,701 1/1926 Bostrum 273-150 J' H'WOLFFASSStamEXammef 1,864,709 6/1932 Aronson 40-107 U.S. C1.X.R. 2,178,193 10/1939 Wade 273-146 3570 

